For a tablet containing 500mg vitamin C, Calculate how many mL of 0.095M NaOH are required for titration ( molar mass of ascorbic acid- vitamin c is 1.76.12g/mol)
I am not sure of the conversions to use, how to get started with the question.
To calculate the volume of 0.095M NaOH required for titration, you will need to use the equation:
number of moles = concentration × volume
To start, we need to calculate the number of moles of ascorbic acid (vitamin C) in the tablet.
Given:
Mass of vitamin C = 500 mg = 0.5 g
Molar mass of vitamin C = 176.12 g/mol
To find the number of moles, use the following equation:
moles = mass ÷ molar mass
moles = 0.5 g ÷ 176.12 g/mol
Calculate the moles of vitamin C in the tablet.
To solve this question, you need to use the concept of stoichiometry and the equation of the reaction between vitamin C (ascorbic acid) and NaOH. Here's how you can get started:
Step 1: Write the balanced equation for the reaction between ascorbic acid (C6H8O6) and NaOH (sodium hydroxide). The reaction can be represented as follows:
C6H8O6 + NaOH -> C6H7O6Na + H2O
Step 2: Determine the molar mass of ascorbic acid (vitamin C) using the given information. The molar mass of ascorbic acid is stated as 176.12 g/mol.
Step 3: Calculate the number of moles of ascorbic acid in the tablet by using the given mass of vitamin C.
Number of moles = mass (in grams) / molar mass
In this case, the mass of vitamin C is given as 500 mg (milligrams). To convert this to grams, divide by 1000.
Mass of vitamin C = 500 mg / 1000 = 0.5 g
Now, calculate the number of moles of ascorbic acid:
Number of moles = 0.5 g / 176.12 g/mol
Step 4: Knowing the balanced equation, you can see that the stoichiometric ratio between ascorbic acid and NaOH is 1:1. This means that for every 1 mole of ascorbic acid, you need 1 mole of NaOH.
Step 5: Use the molarity of NaOH (0.095 M) to calculate the volume of NaOH required for titration. The molarity (M) is defined as moles of solute per liter of solution.
Volume (in liters) = moles / molarity
In this case, the number of moles of NaOH is equal to the number of moles of ascorbic acid (from step 3).
Step 6: Convert the volume of NaOH from liters to milliliters (mL) if necessary.
Following these steps, you should be able to calculate the volume of 0.095 M NaOH required for titration.
Call Ascorbic acid just HA.
HA + NaOH ==> H2O + NaA
mols vitamin C (HA) = grams/molar mass = 0.500/molar mass
mols NaOH required = same since the ratio in the equation is 1:1.
Then M NaOH = mols NaOH/L NaOH. You have M NaOH and mols NaOH, solve for L NaOH and convert to mL.